FIELD: heat supply systems.
SUBSTANCE: water-heating device comprises heat pump, outer circulation coolant circuit provided with a heat exchanger submerged into the water in the tank for rain water. The cold fluid supplied from the heat pump is heated in the heat exchanger and is returned to the heat pump. The heat exchanger is made of a set of segments. Each segment has collector for direct and return flow. The pump and valves are controlled from the electronic controller.
EFFECT: .
25 cl, 9 dwg
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